Mostly sheps, dobies, pitties, and rotties. Some have size limitations. Best bet is to check with the cg you plan on going to. You can tell them it's a mutt or a mixed breed if they ask-only concern would be if it strongly resembles one of their banned breeds it could be an issue.
Have to agree with xteacher on the American bulldog. They also get confused with boxers. Our neighbor has one and she's a good dog but our other neighbor refuses to go near her out of fear.